基于AUSMDV格式的高超声速钝体绕流的数值模拟  

Numerical Simulation for Hypersonic Flow around Bluff Body Based on AUSMDV Scheme

作　　者：聂春生[1] 屈崑[1] 蔡晋生[1] 

机构地区：[1]西北工业大学翼型叶栅空气动力学国防科技重点实验室,西安710072

出　　处：《科学技术与工程》2011年第12期2769-2774,共6页Science Technology and Engineering

摘　　要：围绕高超声速高温流场的高温效应问题,采用有限体积法,以及熵修正的AUSMDV格式,利用时间分裂法求解了完全气体和化学非平衡流场。求解了SOD2激波管问题,并与精确解进行了对比,分析和验证了AUSMDV格式捕获间断的能力。化学非平衡流求解中采用Park化学动力模型,化学反应源项采用准定常法(The New Quasi-Steady-State-Approach)处理,克服了化学反应源项引起的刚性问题,结果与CEA程序的计算结果进行了比较,研究了高超声速圆柱绕流流场,分析了化学反应对流场的影响。结果证明了计算方法与程序的有效性和实用性。This paper focus on the high-temperature effects on hypersonic flow field.,using the finite volume method,the entropy corrected AUSMDV scheme and the time splitting method to compute the perfect gas and chemical non-equilibrium flow field.The SOD2 shock tube problem is computed and the results are compared to exact solutions,and also discuss the ability of AUSMDV to capture discontinuities.Chemical non-equilibrium flow field is also solved using Park chemical kinetic mode,and the chemical source is deal with the Asymptotic Method which can overcome the rigidity induced by the source term.The result is compared with solution computed by the CEA program.The hypersonic flow field around a cylinder is researched,and the effect of chemistry on the flow field is diseussed.The result proves that our method and programs are effective and practical.

关 键 词：AUSMDV格式 时间分裂法 刚性 化学非平衡 

分 类 号：O354.4[理学—流体力学]